Figure 1. Flowchart of the analytic sample (unweighted).

Notes: subgroups are represented by unweighted frequencies and weighted percentages. *This question was administered to all respondents reporting ever using marijuana or hashish. Only responses from those with a history of monthly use >1 year were analyzed. †Years of monthly cannabis use before MI was determined by responses to the following questions: “How old were you when you started smoking marijuana or hashish at least once a month for one year?” (age in years) and “How long has it been since you last smoked marijuana or hashish at least once a month for one year?” Years of monthly use were calculated by subtracting the number of years since using it monthly for a year from a respondent’s current age and then subtracting the age at which they reported starting using it monthly for a year. If the number of years since a reported MI was greater than the number of years since monthly use, the difference was subtracted from the number of years of monthly use, resulting in years of monthly use before the MI.